giffin



(No Model.)

0. J. & D. A. GIFPIN. -SUBSOIL ATTACHMENT r03 PLOWS.

No. 556,463. Patented Mar. 17,1896.

Zgzfrce 365,

ANDREW B GRAHAM.PnoYO-UTNQWASMINGTONJL.

UNITED STATES PATENT 'FFICE.

COLUMBUS J. GIFFIN AND DAVID A. GIF FIN, OF KNOXVILLE, TENNESSEE,ASSIGNQRS OF ONE-THIRD TO SAMUEL B. GIFFIN, OF SAME PLACE.

SUBSOIL ATTACHMENT FOR PLOWS.

SPECIFICATION forming part of Letters Patent No. 556,463, dated March 171896.

Application filed April 16, 1895. Serial No. 545,924. (No model.)

To all whom it may concern:

Be it known that we, COLUMBUS J. GIFFIN and DAVID A. GIFFIN, citizens ofthe United States, residing at Knoxville, in the county of Knox andState of Tennessee, have invented certain new and useful Improvements inSubsoil Attachments for Plows and we do declare the following to be afull, clear, and exact description of the invent-ion, such as willenable others skilled in the art to which it appertains to make and usethe same.

This invention relates to subsoil attachments for plows, and it has forits object to improve such devices by simplifying the construction,increasing the efficiency, and adapting the parts for operation so as toadjust the point of the subsoiler, and to also adjust the share orplow-blade.

The invention will be fully understood from the following descriptionand claim when taken in connection with the annexed drawings, in which-Figure 1 is a perspective view of a plow with parts broken away and ourimproved subsoiler attached. Fig. 2 is a perspective view of thestandard and shoe of the subsoiler. Fig. 3 is a perspective view of theplow or point removed, and Fig. 4: is a horizontal sectional view takenthrough the share or shovel and the shoe and standard of the subsoiler.

Referring by letter to said drawings, A indicates a plow, which may beof any ordinary or approved construction, having a beam at and handlesZ) and also having a standard 6 and a plow-blade (Z connected in theusual manner.

B indicates the subsoiler. This subsoiler is of a peculiar construction.In forming the same we take a bar of iron or other suitable metal of asufficient length and width and shape it to form the standard 6, whichwe provide with a suitable number of holes q for the reception of a bolt7*, by means of which a bail D is adjustably attached to said standardfor a purpose which will presently appear. The forward edge of thestandard 6 is curved downwardly and forwardly, as shown, and this curvedportion is sharpened so as to form a cutter from the lower hole q to itslower terminal. 011 the lower end of this bar or standard we weld a footg, which is disposed obliquely or pitched rearwardly and outwardly fromits forward end 1;, which, is pointed, as shown. We then forge a similarwing g on the opposite side of the standard, the point of connectionbeing indicated by the upper dotted line 2. Both wings of the foot meetat an acute angle, and the forward ed e of the standard is provided witha shoulder w to form an abutment for the plow of the subsoiler.

0 indicates the plow of the subsoiler, which comprises two wings 70,which deflect rearwardly and meet at their forward ends in an acuteangle Z, and this plow is designed to fit snugly over the foot at thelower end of the standard. The wings 7e are provided with holes m, whichare designed to register with the holes j in the feet or wings g g, andbolts n take through the holes of the respective parts and are securedby means of nuts 19 or the like. The standard eof the subsoiler B is adj ustably secured to the beam of the plow by means of a yoke s and aplate 25 and nuts or the like. This beam of the plow is provided on oneside and near its forward end with a forwardly-directed hook E.

F indicates a rod or bar. This rod is connected at one end to the bail Dof the standard of the subsoiler by a hook it, and the opposite end ofthe rod is adj ustably attached to the hook E by forming bends or loopso in said rod to engage the book, as shown.

By this construction it will be seen that we have the subsoiler capableof vertical adj ustment on theplow-beam. The rod F is adj ustablysecured to the standard of the subsoiler,

and the said rod is also adj ustably attached to the beam, so that saidsubsoiler can be adjusted vertically on the beam and can be thrown onand off the point and that the rod is adjustably connected at both ends.

It will also be observed that the cuttingedge of the standard of thesubsoiler is disposed in the same longitudinal plane as the point of themain plow, so that it, the subsoiler, will follow in the line out by theplowpoint and thereby ease the operation of the latter.

Having described our invention, what we claim is The combination with aplow; of the subsoiler B, comprising the standard 6, curved and havingthe forward edge of its curved portion sharpened and also having theholes g, at intervals in its length, the foot Welded and forged on thelower end of the standard and comprising the wings g, g, provided withholes, the ploweoinposed of the two blades 70, fitting snugly over thefoot and having holes to register with those in the wings of the foot,bolts and nuts for securing the wings g, g, and the plow-blades 70,together, the hook E, on the plow-beam, the bail D, adj ustablyconnected to the standard 8, by a bolt taking through one of the holes(1, in said standard,

tures in presence of two Witnesses.

COLUMBUS J. GIFFIN. DAVID A. GIFFIN. \Vitn esses:

S. H. FORD, HERBERT 11. FORD.

